On Windows, you can easily install Skin packs and themes to customize the operating system’s look.
After you extract the File open the new folder that appears In the folder there is another Folder called Mac OS X Leopard You don't need to open that folder Move or copy that folder to the rocketdock Skin's folder The Skins folder is found by: My computer Local dick (C:) Program Files RocketDock Skins and just put the folder in that.